考虑多尺度结构相似性关系的轮廓簇自动泛化技术

IF 2.1 3区 地球科学 Q2 GEOGRAPHY Transactions in GIS Pub Date : 2024-08-17 DOI:10.1111/tgis.13232
Rong Wang, Haowen Yan, Juanli Jin, Xiaorong Gao
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引用次数: 0

摘要

与单个线条的简化不同,以地理特征为导向的等高线集群泛化是一种结构化泛化行为,它从空间认知的角度提取地理特征知识。在决策层面上,地形泛化本质上是多尺度等高线群所对应的地貌结构之间的相似性转换。然而,多尺度结构相似性关系与等高线泛化的应用并无直接联系。因此,本文提出了一种考虑多尺度结构相似性的地形等高线结构泛化自动方法。首先,根据等高线构建排水树结构,建立山谷分支与等高线弯曲之间的关联。然后,利用间接定量表达方法探索多尺度结构相似性与地图尺度变化之间的定量关系。最后,根据多尺度结构相似性关系,通过迭代优化原理,实现了等高线结构泛化的全自动化。实验结果证明了基于多尺度地貌结构相似性关系的全自动轮廓泛化过程的合理性和可行性。所提出的方法不仅克服了地图泛化中 "选多少 "的难题,而且对丰富空间相似性关系和地图泛化内容具有重要价值,从而为国家基础矢量数据库建设提供了理论方法体系和支撑。
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Automated Generalization of Contour Cluster Considering Multi‐Scale Structural Similarity Relations
Unlike the simplification of individual lines, the generalization of contour clusters oriented to geographical features is a structured generalization behavior that extracts knowledge of geographical features form the perspective of spatial cognition. In decision level, terrain generalization is essentially a similarity transformation between the geomorphic structures corresponding to multi‐scale contour cluster. However, the multi‐scale structural similarity relations are not directly connected with the application of contour generalization. Therefore, this paper presents an automated method for terrain contour structured generalization considering multi‐scale structural similarity. Firstly, a drainage tree structure is constructed from contour lines to establish associations between valley branches and contour bends. Then, the quantitative relationships between multi‐scale structural similarity and map scale changes are explored using an indirect quantitative expression method. Finally, the contour structural generalization is fully automated through iterative optimization principle based on the multi‐scale structural similarity relations. The experiment results demonstrate the rationality and feasibility of fully automating the contour generalization process based on multi‐scale geomorphic structural similarity relations. And the proposed method not only overcomes the challenge of determining “how much to select” in map generalization, but also is valuable for enriching the content of spatial similarity relations and map generalization, thereby providing a theoretical method system and support for the construction of national basic vector databases.
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来源期刊
Transactions in GIS
Transactions in GIS GEOGRAPHY-
CiteScore
4.60
自引率
8.30%
发文量
116
期刊介绍: Transactions in GIS is an international journal which provides a forum for high quality, original research articles, review articles, short notes and book reviews that focus on: - practical and theoretical issues influencing the development of GIS - the collection, analysis, modelling, interpretation and display of spatial data within GIS - the connections between GIS and related technologies - new GIS applications which help to solve problems affecting the natural or built environments, or business
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